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<div class="title">bounce_basic.ino</div>  </div>
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<p>Basic example of the <a class="el" href="class_bounce.html" title="The Debouncer:Bounce class. Links the Deboucing class to a hardware pin. This class is odly named,...">Bounce</a> class.</p>
<div class="fragment"><div class="line"> </div>
<div class="line">/*</div>
<div class="line">  DESCRIPTION</div>
<div class="line">  ====================</div>
<div class="line">  Simple example of the Bounce library that switches a LED when</div>
<div class="line">  a state change (from HIGH to LOW) is triggered (for example when a button is pressed).</div>
<div class="line"> </div>
<div class="line">  Set BOUNCE_PIN to the pin attached to the input (a button for example).</div>
<div class="line">  Set LED_PIN to the pin attached to a LED.</div>
<div class="line"> </div>
<div class="line">*/</div>
<div class="line"> </div>
<div class="line">// WE WILL attach() THE Bounce INSTANCE TO THE FOLLOWING PIN IN setup()</div>
<div class="line">#define BOUNCE_PIN 2</div>
<div class="line"> </div>
<div class="line">// DEFINE THE PIN FOR THE LED :</div>
<div class="line">// 1) SOME BOARDS HAVE A DEFAULT LED (LED_BUILTIN)</div>
<div class="line">#define LED_PIN LED_BUILTIN</div>
<div class="line">// 2) OTHERWISE SET YOUR OWN PIN</div>
<div class="line">// #define LED_PIN 13</div>
<div class="line"> </div>
<div class="line">// Include the Bounce2 library found here :</div>
<div class="line">// https://github.com/thomasfredericks/Bounce2</div>
<div class="line">#include &lt;Bounce2.h&gt;</div>
<div class="line"> </div>
<div class="line"> </div>
<div class="line">// INSTANTIATE A Bounce OBJECT</div>
<div class="line">Bounce bounce = Bounce();</div>
<div class="line"> </div>
<div class="line">// SET A VARIABLE TO STORE THE LED STATE</div>
<div class="line">int ledState = LOW;</div>
<div class="line"> </div>
<div class="line">void setup() {</div>
<div class="line"> </div>
<div class="line">  // BOUNCE SETUP</div>
<div class="line"> </div>
<div class="line">  // SELECT ONE OF THE FOLLOWING :</div>
<div class="line">  // 1) IF YOUR INPUT HAS AN INTERNAL PULL-UP</div>
<div class="line">  bounce.attach( BOUNCE_PIN ,  INPUT_PULLUP ); // USE INTERNAL PULL-UP</div>
<div class="line">  // 2) IF YOUR INPUT USES AN EXTERNAL PULL-UP</div>
<div class="line">  //bounce.attach( BOUNCE_PIN, INPUT ); // USE EXTERNAL PULL-UP</div>
<div class="line"> </div>
<div class="line">  // DEBOUNCE INTERVAL IN MILLISECONDS</div>
<div class="line">  bounce.interval(5); // interval in ms</div>
<div class="line"> </div>
<div class="line">  // LED SETUP</div>
<div class="line">  pinMode(LED_PIN, OUTPUT);</div>
<div class="line">  digitalWrite(LED_PIN, ledState);</div>
<div class="line"> </div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line">void loop() {</div>
<div class="line">  // Update the Bounce instance (YOU MUST DO THIS EVERY LOOP)</div>
<div class="line">  bounce.update();</div>
<div class="line"> </div>
<div class="line">  // &lt;Bounce&gt;.changed() RETURNS true IF THE STATE CHANGED (FROM HIGH TO LOW OR LOW TO HIGH)</div>
<div class="line">  if ( bounce.changed() ) {</div>
<div class="line">    // THE STATE OF THE INPUT CHANGED</div>
<div class="line">    // GET THE STATE</div>
<div class="line">    int deboucedInput = bounce.read();</div>
<div class="line">    // IF THE CHANGED VALUE IS LOW</div>
<div class="line">    if ( deboucedInput == LOW ) {</div>
<div class="line">      ledState = !ledState; // SET ledState TO THE OPPOSITE OF ledState</div>
<div class="line">      digitalWrite(LED_PIN,ledState); // WRITE THE NEW ledState</div>
<div class="line">    }</div>
<div class="line">  }</div>
<div class="line"> </div>
<div class="line"> </div>
<div class="line"> </div>
<div class="line">}</div>
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